Frontend Engineer - React/TypeScript, Performance & Design Systems

Evlo AI; Chicago (IL); On-site; USD 120,000 - 180,000; Full time

Job summary

Evlo AI is shaping the frontend surface of its product with high-performance web applications built in React and TypeScript. You will collaborate with designers, backend engineers, and product managers to translate complex requirements into fast, accessible interfaces, owning component architecture and rendering performance.

The role emphasizes design system ownership, API integration, and strong focus on accessibility and WCAG 2.1 AA compliance across customer-facing surfaces.

Qualifications

• 3–6 years of professional frontend experience building production web applications at scale.
• Expertise in React and TypeScript with strong JavaScript fundamentals.
• Hands-on experience with state management patterns (Redux Toolkit, Zustand, React Query) and data-fetching libraries.
• Track record of measurable performance work: code splitting, lazy loading, caching strategies, Web Vitals optimization.
• Comfort with build tooling (Vite or Webpack), package management, and monorepo workflows (Turborepo or Nx).
• Bachelor's degree in Computer Science or equivalent practical experience.
• Bonus: Next.js, server-side rendering strategies, WebAssembly, or building design systems consumed by multiple teams.

Responsibilities

• Design and build responsive, accessible user interfaces in React, TypeScript, and modern CSS for customer-facing web applications.
• Architect and maintain component libraries and design system integrations, ensuring consistency across product surfaces.
• Integrate with REST and GraphQL APIs, handling caching, optimistic updates, and error/retry strategies in client state management.
• Diagnose and resolve performance issues — bundle size, render cost, Core Web Vitals — and establish performance budgets in CI.
• Write comprehensive unit and integration tests using Jest or Vitest and Playwright; maintain CI/CD pipelines for frontend builds and deploys.
• Conduct code reviews and pair with backend engineers on API contracts, TypeScript types, and data-loading patterns.
• Collaborate with designers in Figma to validate implementations and contribute to usability and accessibility improvements (WCAG 2.1 AA).

Skills

React

TypeScript

Redux Toolkit

Zustand

React Query

Performance optimization

Vite

Webpack

Turborepo

Nx

Next.js

Education

Bachelor's degree in Computer Science

Tools

Jest

Vitest

Playwright

REST APIs

GraphQL

CI/CD pipelines

Figma

Job description

Evlo AI is shaping the frontend surface of its product with high-performance web applications built in React and TypeScript. You will collaborate with designers, backend engineers, and product managers to translate complex requirements into fast, accessible interfaces, owning component architecture and rendering performance.

The role emphasizes design system ownership, API integration, and strong focus on accessibility and WCAG 2.1 AA compliance across customer-facing surfaces.